Behavior In Degraded Mode; Interface To Service Devices - Siemens FDOOT221 Technical Manual

3 Structure and function
Function
3.4.10
3.4.11
38
Building Technologies
Fire Safety

Behavior in degraded mode

Applicable for the FDnet:
When the main processor of the fire control panel fails, the control panel is in
degraded mode operation. Depending on the control panel type, the fire control
panel can continue to perform the most important alarming and signaling functions
in degraded mode operation.
Degraded mode operation behavior on control panels that support degraded mode
operation:
Alarming is still ensured in degraded mode operation.
In degraded mode only collective alarming is possible. This means that in the
event of an alarm, it is possible to identify the detector line but not the exact
location of the detector triggering the alarm.
If a sounder base is connected to the output for the external alarm indicator, it
is activated in degraded mode operation if there is a fire alarm (only with
detectors and sounder bases with ES
panel is possible.
When the connection for the external alarm indicator is used for a control
function (e.g. hold-open system), the output assumes the configured fail-safe
position (only with detectors with ES
panel is possible.
Degraded mode operation on the FDnet is not supported in the same way by all
control panels. The information in the 'List of compatibility' and in the corresponding
control panel documentation must be taken into account during project planning.

Interface to service devices

A proximity interface (MC link) is available for commissioning and maintenance in
order to communicate with the detector exchanger and tester FDUD292 and the
intelligent detector tester FDUD293.
You will find more information in documents 007227 and 009718.
Applicable documents [
See also
Status polling with the detector exchanger and tester [
110]
30); configuration for a specific control
30); configuration for a specific control
9]
007004_n_en_--
01.07.2012